CH3−BrMg−−−→ether (CH3)3C−OH−−−−−−−−−→A(gas).′A′is
(CH3)3C - O - CH3
CH4
(CH3)3 C - O - Br
(CH3)3 CH
CH3BrMg−−−→etherCH3MgBr(CH3)3C−OH−−−−−−−−−→CH4